Aeration butterfly valve



FIG. 1 is a top view of the aeration butterfly valve of this invention;

FIG. 2 is a bottom view;

FIG. 3 is a left side view;

FIG. 4 is a right side view;

FIG. 5 is a front view; and,

FIG. 6 is a back view. 

CLAIM The ornamental design for the aeration butterfly valve, as shown and described. 